I'm a huge fan of my little white MacBook. I think it's just about the best deal on the planet for a personal computer, laptop or otherwise. The only thing that isn't so hot is the screen size. Great for use as a laptop, not so great for sitting at a desk all day.
So I went out looking for a cheap monitor that wasn't totally hideous and rendered text nicely, and I found this: a Hanns G 19" widescreen. No, I've never heard of them before ... but it gets the job done nicely. I bought it at a local shop, but Amazon has it for $180. We now have a couple of 'em, one at home on the Mac Mini, and one at work. No troubles what so ever.
If you need a little extra screen space, and you're not a stickler for color accuracy or incredibly high resolution, it's a pretty sweet deal.